Horizontal Center - Learning CSS Layout

How to align the "divBox" and "spanBox" into the center of the "divWrapper"?

horizontal

Options

divWrapper

none

text-align: center;

align: center;

divBox

none

text-align: center;

align: center;

margin: 0 auto;

spanBox

none

text-align: center;

align: center;

Preview

divWrapper

divBox

spanBox